ANS-C01 Network Implementation Practice Question
A company is deploying a web application that will be accessed over the internet. They want to use an Application Load Balancer (ALB) to distribute traffic across EC2 instances in multiple Availability Zones. Which TWO configurations are required to make the ALB internet-facing? (Choose TWO.)
⚠ Common exam trap
It's easy for candidates to confuse security group rules (Option A) or Elastic IP assignment (Option B) with the fundamental requirement of an internet-facing scheme and public subnet association, which are the only two configurations that actually make the ALB internet-facing.
Answer choices
Why each option matters
Answer the question above first, then reveal the full breakdown to understand why each option is right or wrong.
Correct answer & explanation
✓
Associate the ALB with public subnets that have a route to an Internet Gateway.
An internet-facing ALB must be associated with public subnets that have a route to an Internet Gateway (IGW). This ensures the ALB's nodes receive public IP addresses and can accept traffic from the internet. Option E is correct because the scheme must be explicitly set to 'internet-facing' during creation; this determines whether the ALB gets public IP addresses and is reachable from the internet.
Answer analysis
Option-by-option breakdown
For each option: why learners choose it and why it is or isn't the right answer here.
- ✗
Configure a security group that allows inbound traffic from 0.0.0.0/0.
Why it's wrong here
Security groups control traffic but do not make the ALB internet-facing.
- ✗
Assign an Elastic IP address to the ALB.
Why it's wrong here
ALB does not support Elastic IP; it gets a public DNS name.
- ✗
Associate the ALB with private subnets only.
Why it's wrong here
Private subnets do not have internet routes.
- ✓
Associate the ALB with public subnets that have a route to an Internet Gateway.
Why this is correct
Required for internet-facing ALB.
- ✓
Select 'Internet-facing' as the scheme when creating the ALB.
Why this is correct
This designates the ALB as internet-facing.
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Written by Johnson Ajibi, MSc IT Security
Senior Network & Security Engineer · founder of Courseiva
This ANS-C01 practice question is part of Courseiva's free Amazon Web Services certification practice question bank. Courseiva provides original exam-style practice questions with explanations, topic-based practice, mock exams, readiness tracking, and study analytics to help learners prepare for the ANS-C01 exam.